Alexander
von Humboldt was a German scientist and traveler with a cosmopolitan education
and a wide range of interests. Together with a French botanist Bonpland, von
Humboldt arrived at Cuman, Venezuela on June 4th, 1799. They travelled along
the Orinoco River to its confluence with the Atabapo River. In November 1800,
they sailed to Havana and explored all over Cuba. In March 1801, they continued
to Cartagena, Colombia. Along the Rio Magdalena River, they travelled to Honda
and Bogota in Colombia and further to Quito, Eduador. They investigated the
western slopes of the Peruvian Andes and travelled all the way to the Pacific Ocean.
After a stay in Lima, Peru, they journeyed from Calla to Acapulco in Mexico,
where they arrived in March 1803. They spent an entire year exploring Mexico,
travelling mainly through volcanic mountain ranges. In 1804, they returned to
Cuba. In 1804, they returned to Europe via the United States.

Humboldt from Europeana - image is under CC BY-NC-ND of The Royal Library: The National Library of Denmark and Copenhagen University Library.

Humboldt
became the founder of volcanology; the science of terrestrial magnetism,
geobotany and climatology as part of which he first proposed the concept of
isotherms. He devoted himself to the study of volcanic peaks. During one
expedition, Humboldt (together with Bonpland) climbed Chimborazo to over 5,000
meters. Several places are named in honour of Humboldt including two bays in
California and New Guinea, two mountain ranges in central Asia and Nevada, a
lake and river in Nevada, a glacier in northwest Greenland, a current in the
Pacific Ocean and many cities in America.